The Lepai is good
for what it is. A small, cheap chip-amp. I have 1 in an arcade build, and a copy-cat Kinter amp in a different build. My Lepai runs a set of small Dayton Audio cube speakers, and it sounds surprisingly good for a small cheap amp running small cheap speakers, like $60 for the combo.
I did want to mention that the new model is likely a little better (linked above),as it certainly has a better quality TI chip now, and the new model is the 2020TI to reflect that update. I can't remember which one I have, I bought it around the time of the transition.
I agree that I typically "don't like wall warts" for amps, but that chip really takes care of those types of concerns, from the datasheet:
Feedback Power-Stage Architecture With High PSRR Reduces PSU Requirements
EDIT: https://www.parts-express.com/DisplayProductVideo.aspx?VideoID=3002&zpid=39930